[A comparative study on the patients with VVI and AAI pacing by equilibrium radionuclide angiography].

Twenty two patients (15 cases of VVI and 7 cases of AAI) were studied before and after implanted pacemaker comparatively with equilibrium radionuclide angiography (ERNA). The results of the phase analysis (PA) and the cardiac function parameters showed that the ventricular excitement conduction-systolic sequence (VEC-SS) of VVI pacemaker group was abnormal, the ventricular systolic coordination (VSC) and the global ventricular systolic function (GVSF) were reduced, while the early ventricular ejection fraction and the diastolic filling velocity were increased after implantation VEC-SS and VSC of AAI group showed no change and the GVSF got improved after implantation. VES-SS of VVI group was abnormal, VSC and GVSF of VVI group were reduced as compared with those of control group, but no changes were found in AAI group after implantation. Hemodynamics appeared to be better in AAI group than that of VVI group, as evidenced by normal VEC-SS and VSC as well as increased GVSE.